[tex-k] E20, E35

[胡亚捷 (Hu Yajie)]

Page E20, line 4
Change "Computers and Typesetting" to "Computers & Typesetting".

Page E20, line 12
Change the "in" in "250/36Pt# = 1in#" from roman to text italic，
for consistency with other sharped units.

Page E35, line 5
Change "cmmitt10" to "cmitt10" (cf. page 28).

Page E35, line 10
Change "cmsy12" to "cmbsy10" (cf. pages 32--34).